LV Condensing Section
8 733 922 118 (2015/01)
Installation, Operation and Maintenance Manual
2 | Condensing Section/Air Handler Pairing
LV Condensing Section
CONTENTS
Condensing Section/Air Handler Pairing ............................. 2
CONDENSING SECTION/AIR HANDLER
PAIRING
UNIT MODEL
Key to Symbols.................................................................. 3
Safety Warnings................................................................ 3
General Description........................................................... 4
Moving and Storage........................................................... 4
Initial Inspection ............................................................... 4
Location............................................................................ 4
Condensing Section ..................................................... 4
Air Handler ................................................................. 5
Water Quality .................................................................... 5
INSTALLATION .................................................................. 7
Condensing Section ..................................................... 7
Water Piping ..................................................................... 7
Electrical .......................................................................... 7
- High Voltage.............................................................. 8
- Low Voltage .............................................................. 8
Cooling and Heating Modes ........................................... 9
Unit Protection Module Safety Features .......................... 9
Options........................................................................... 14
Unit Mounted Non-Fused Disconnect Switch.................. 14
Internal 2-Way Water Valve ......................................... 14
Automatic Flow Control Valve ...................................... 14
LED Annunciator........................................................ 14
Flow Proving Switch................................................... 14
Application Considerations .............................................. 14
Well Water Systems ................................................... 14
Cooling Tower/Boiler Systems ..................................... 15
Geothermal Systems .................................................. 17
LV018-1CSC
LV018-2CSC
LV024-1CSC
LV024-2CSC
LV024-3CSC
LV024-4CSC
LV030-1CSC
LV030-2CSC
LV030-3CSC
LV030-4CSC
LV036-1CSC
LV036-2CSC
LV036-3CSC
LV036-4CSC
LV042-1CSC
LV042-3CSC
LV042-4CSC
LV048-1CSC
LV048-3CSC
LV048-4CSC
LV060-1CSC
LV060-3CSC
LV060-4CSC
LV070-1CSC
LV070-3CSC
LV070-4CSC
Paired Air Handler
Unit 1
Unit 2
LV018-1AVX LV018-1AHX
LV018-2AVX LV018-2AHX
LV024-1AVX LV024-1AHX
LV024-2AVX LV024-2AHX
LV024-1AVX LV024-1AHX
LV024-4AVX LV024-4AHX
LV030-1AVX LV030-1AHX
LV030-2AVX LV030-2AHX
LV030-1AVX LV030-1AHX
LV030-4AVX LV030-4AHX
LV036-1AVX LV036-1AHX
LV036-2AVX LV036-2AHX
LV036-1AVX LV036-1AHX
LV036-4AVX LV036-4AHX
LV042-1AVX LV042-1AHX
LV042-1AVX LV042-1AHX
LV042-4AVX LV042-4AHX
LV048-1AVX LV048-1AHX
LV048-1AVX LV048-1AHX
LV048-4AVX LV048-4AHX
LV060-1AVX LV060-1AHX
LV060-1AVX LV060-1AHX
LV060-4AVX LV060-4AHX
LV070-1AVX LV070-1AHX
LV070-1AVX LV070-1AHX
LV070-4AVX LV070-4AHX
System Checkout ............................................................ 18
Unit Start-up ................................................................... 18
Maintenance ................................................................... 18
Unit Check-Out Sheet ...................................................... 20
Customer Data .......................................................... 20
Unit Nameplate Data .................................................. 20
Operating Conditions ................................................. 20
Auxiliary Heat............................................................ 21
Troubleshooting .............................................................. 22
Operating Temperatures and Pressures ............................ 27
Compressor Characteristics............................................. 31
Wiring Diagrams.............................................................. 32
Dimensional Drawings ..................................................... 34
Notes.............................................................................. 35
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LV Condensing Section
LV Condensing Section
Key to Symbols | 3
LV CS MODEL NOMENCLATURE
LV
024
-
1
CS
C
-
F
WATER CONNECTIONS
LV
F - Front
SIZE
COAX OPTIONS
018
024
030
036
042
048
060
070
C - Copper
N - Cupro-Nickel
CABINET CONFIGURATION
CS - Condensing Section
VOLTAGE DESIGNATIONS
- 208/1/60 & 230/1/60
- 277/1/60
- 208/3/60 & 230/3/60
- 460/3/60
1
2
3
4
Revision level 032014
KEY TO SYMBOLS
Warnings
Warnings in this document are identified by
a warning triangle printed against a grey
background. Keywords at the start of the
warning indicate the type and seriousness
of the ensuing risk if measures to prevent
the risk are not taken.
The following keywords are defined and can be
used in this document:
• NOTE indicates a situation that could result in
damage to property or equipment.
• CAUTION indicates a situation that could
result in minor to medium injury.
• WARNING indicates a situation that could
result in severe injury or death.
• DANGER indicates a situation that will result in
severe injury or death.
Important Information
This symbol indicates important information
where there is no risk to property or people.
SAFETY WARNINGS
Installation and servicing of this equipment
can be hazardous due to system pressure
and electrical components. Only trained
and qualified personnel should install,
repair, or service the equipment.
Revised 01-15
Before performing service or maintenance
operations on the system, turn off main
power to the unit. Electrical shock could
cause personal injury or death.
When working on equipment, always
observe precautions described in the
literature, tags, and labels attached to the
unit. Follow all safety codes. Wear safety
glasses and work gloves. Use a quenching
cloth for brazing, and place a fire
extinguisher close to the work area.
To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this
unit must be serviced only by technicians
who meet local, state, and federal
proficiency requirements.
All refrigerant discharged from this unit
must be recovered WITHOUT EXCEPTION.
Technicians must follow industry accepted
guidelines and all local, state, and federal
statutes for the recovery and disposal of
refrigerants. If a compressor is removed
from this unit, refrigerant circuit oil will
remain in the compressor. To avoid leakage
of compressor oil, refrigerant lines of the
compressor must be sealed after it is
removed.
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4 | General Description
LV Condensing Section
R410A is flammable when exposed to open
flame. Recover all refrigerant prior to
brazing.
GENERAL DESCRIPTION
The LV Split water-to-air heat pump provides an
unmatched combination of performance, features
and flexibility for both high performance new
construction applications and replacement of
existing water-to-air heat pumps. All units are
certified by the Air conditioning, Heating and
Refrigeration Institute (AHRI) to AHRI/ANSI/
ASHRAE/ISO standard 13256-1 for water-to-air
and brine-to-air heat pumps at both Water Loop
Heat Pump and Ground Loop Heat Pump
application points.
These units are safety listed with Intertek Test
Labs (ETL) to cUL standard 1995 and certified to
CAN/CSA C22.1 No 236. These units meet all
current applicable requirements of ASHRAE 90.1.
Split system heat pumps consist of two
independently installed sections allowing for
centralized air distribution while remotely locating
the section containing the compressor and waterto-refrigerant heat exchanger.
In the cooling mode, the air coil in the air handler
section serves as an evaporator and the water-torefrigerant heat exchanger serves as a condenser.
In the heating mode, their roles are reversed.
In cooling mode, the refrigerant lines connecting
the two sections consist of one line carrying liquid
refrigerant and another carrying refrigerant vapor.
The liquid carrying line will be referred to as the
liquid line while the vapor carrying line will be
referred to as the suction line.
These units are designed and rated for indoor
installation only. LV cabinets are constructed of
heavy gauge G-90 galvanized steel and will resist
most common types of corrosion for the life of the
equipment.
The Water-to-Air Heat Pumps are designed to
operate with entering fluid temperature between
20°F to 80°F in the heating mode and between
50°F to 110°F in the cooling mode.
For well water applications, a 50°F Minimum
Entering Water Temperature (EWT) is
recommended with sufficient water flow to
prevent the water coil from freezing. Antifreeze
solution is required for all closed loop
applications.
8 733 922 118 (2015/01)
Cooling Tower/Boiler and Geothermal
applications without antifreeze must have
means to protect against extreme conditions
and equipment failure. Frozen water coils are
not covered under warranty. Other equivalent
methods of temperature control are acceptable.
Several factory installed options are available:
Flow Proving Switch, Auxiliary Pump Relay, Zone
Valve, Measure Flow, Compressor Monitor Relay,
Phase Monitor, Boilerless Control, Disconnect
Switch and Status LED. See Options section for
more detail.
Safety devices are built into each unit to provide
the maximum system protection possible when
properly installed and maintained.
MOVING AND STORAGE
If the equipment is not needed for immediate
installation upon its arrival at the job site, it should
be left in its packaging and stored in a clean, dry
area. Units must only be stored or moved in the
normal upright position.
INITIAL INSPECTION
Be certain to inspect all packaging for each unit as
received at the job site before signing the freight
bill. Verify that all items have been received and
that there are no visible damages; note any
shortages or damages on all copies of the freight
bill. In the event of damage or shortage, remember
that the purchaser is responsible for filing the
necessary claims with the carrier. Concealed
damages not discovered until after removing the
units from the packaging must be reported to the
carrier within 24 hours of receipt.
LOCATION
To maximize system performance, efficiency and
reliability, and to minimize installation costs, it is
always best to keep the refrigerant lines as short
as possible. Every effort should be made to locate
the air handler and the condensing section as
close as possible to each other.
Condensing Section
The condensing section is designed for indoor use.
Locate the condensing section in an area that
provides sufficient room to make water and
electrical connections, and allows easy removal of
the access panels, for service personnel to
perform maintenance or repair.
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Air Handler
Locate the air handler unit in an indoor area that
allows easy removal of the filter and access panels,
and has enough room for service personnel to
perform maintenance or repair. Provide sufficient
room to make electrical and duct connections. If
the unit is located in a confined space such as a
closet, provisions must be made for return air to
freely enter that space.
Reference the Factory Manual for your Air
Handler, or the BOSCH Air Handler section of
this manual for detailed installation and
operation.
WATER QUALITY
Failure to insure proper water quality and
flow rates can shorten the life of the heat
pump and potentially void the unit
warranty.
Water Quality | 5
To limit scaling, water flow rates should be kept at
3 gallons/minute per nominal cooling ton (a 10°F
temperature rise in cooling) and care should be
taken to avoid air in the water lines from suction
side leaks. Cupro-nickel coils are generally
recommended.
In installations with high hydrogen sulfide, chlorine
or ammonia, corrosion is a potential problem. In
these installations a cupro-nickel heat exchanger is
recommended along with maintaining proper flow
and keeping air out of the system. If water quality
is outside of the values in Table #1, then a closed
loop is recommended.
Fouling due to iron bacteria can also pose
problems in some open loop installations. Iron
bacteria fouling can quickly degrade system
performance and plug heat exchangers.
Air in the water system will greatly accelerate
the fouling or corrosion process.
Maintaining proper water quality is important for
insuring a long and trouble free service life for a
heat pump.
For closed loop and boiler/tower systems water
chemistry can be checked and easily maintained to
insure that corrosive elements, dissolved oxygen
and pH levels are kept in check. It is important to
insure that any additive, antifreeze or corrosion
inhibitor that is added to the water loop is
compliant with all applicable laws and regulations
and is compatible with copper, brass and bronze
alloys. Insure that all recommended safety
precautions are followed when handling or adding
chemicals to the water loop.
For open loop systems, water quality is very
important. Table #1 shows acceptable ranges for a
variety of water quality factors. The three main
concerns in open loop installations are scaling,
corrosion and fouling.
In installations with hard water, scaling due to a
buildup of carbonates on the heat exchanger wall
can gradually degrade the heat pump performance
over time. Heat pumps that are affected by scaling
may exhibit low suction pressures in heating and
high head pressures in cooling with a gradual loss
of capacity and efficiency. Scaled heat exchangers
can be cleaned by a qualified technician but care
should be taken to avoid scaling in the first place.
Revised 01-15
8 733 922 118 (2015/01)
6 | Water Quality
LV Condensing Section
Table 1: Water Quality
POTENTIAL
PROBLEM
SCALING
CORROSION
IRON FOULING
Acceptable Value
Water Characteristic
Copper
Cupro-Nickel
pH (Acidity/Alkalinity)
7-9
7-9
Hardness (CaCO3,
MgCO3)
< 350 ppm
< 350 ppm
Ryznar Stability Index
6.0 - 7.5
6.0 - 7.5
Langelier Saturation Index
-0.5 - +0.5
-0.5 - +0.5
Hydrogen Sulfide (H2S)
< 0.5 ppm *
10-50 ppm
Sulfates
< 125 ppm
< 125 ppm
Chlorine
< 0.5 ppm
< 0.5 ppm
Chlorides
< 20 ppm
< 150 ppm
Carbon Dioxide
< 50 ppm
< 50 ppm
Ammonia
< 2 ppm
< 2 ppm
Ammonia Chloride
< 0.5 ppm
< 0.5 ppm
Ammonia Nitrate
< 0.5 ppm
< 0.5 ppm
Ammonia Hydroxide
< 0.5 ppm
< 0.5 ppm
Ammonia Sulfate
< 0.5 ppm
< 0.5 ppm
Dissolved Solids
< 1,000 ppm
< 1,500 ppm
Iron (Fe2+ Iron Bacteria
Potential)
< 0.2 ppm
< 0.2 ppm
Iron Oxide
< 1 ppm
< 1 ppm
Suspended Solids
< 10 ppm, < 600 μm size **
< 10 ppm, < 600 μm size **
Maximum Water Velocity
6 ft/sec
6 ft/sec
EROSION
* No "rotten egg" smell present at < 0.5 ppm H2S.
** Equivalent to 30 mesh strainer
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Subject to change without prior notice
LV Condensing Section
LV Condensing Section
INSTALLATION | 7
INSTALLATION
Loosen compressor mounting bolts.
NOTE: The installer should comply with all
local codes and regulations which govern
the installation of this type of equipment.
Local codes and regulations take precedent
over any recommendations contained in
these instructions. In light of local codes,
the equipment should be installed in
accordance with the recommendations
made by the National Electric Code, and in
accordance with the recommendations
made by the National Board of Fire
Underwriters.
Condensing Section
The condensing section should be mounted on a
vibration absorption pad on a cement slab or
similar support to provide a good base and some
degree of levelness. The cement pad should not
come in contact with the foundation or side of the
dwelling because sound may be transmitted into
the residence. See Figure #1 below.
DO NOT remove the protective caps or plugs
from the service valves until the refrigerant
lines are run and ready for final connections.
Vibration Pad is
recommended
LV units are supplied with either a copper or
optional cupro-nickel condenser. Copper is
adequate for ground water that is not high in
mineral content.
Proper testing is recommended to assure the
well water quality is suitable for use with water
source equipment.
In conditions anticipating moderate scale
formation or in brackish water a cupro-nickel heat
exchanger is recommended.
Use cupro-nickel condenser in ground
water applications due to possibility of high
mineral content and corrosive properties.
Both the supply and discharge water lines will
sweat if subjected to low water temperature.
These lines should be insulated to prevent damage
from condensation. All manual flow valves used in
the system must be ball valves. Globe and gate
valves must not be used due to high pressure drop
and poor throttling characteristics.
Never exceed the recommended water flow
rates as serious damage or erosion of the
water-to-refrigerant heat exchanger could
occur.
Teflon tape sealer should be used when
connecting water piping connections to the units
to protect against leaks and possible heat
exchanger fouling.
Flexible hoses should be used between the unit
and the rigid system to avoid possible vibration.
Ball valves should be installed in the supply and
return lines for unit isolation and unit water flow
balancing. Refer to Options section for factory
supplied flow control options.
ELECTRICAL
Figure # 1
WATER PIPING
Always disconnect power to the unit before
servicing to prevent injury or death due to
electrical shock or contact with moving
parts.
Supply and return piping must be as large as the
unit connections on the heat pump (or larger on
long runs in order to reduce pressure drop losses).
Never use flexible hoses of a smaller inside
diameter than that of the fluid connections
on the unit.
Revised 01-15
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8 | Electrical
LV Condensing Section
- High Voltage
Transformer Settings for 208/230 V Units
All field installed wiring must comply with the
National Electric Code as well as all applicable
local codes. Refer to the unit electrical data on the
unit name plate for wire and branch circuit
protection sizing. Supply power voltage and
phasing should match the required voltage and
phasing shown on the unit name plate. Operating
the unit below the minimum voltage, above the
maximum voltage or with incorrect phasing can
result in poor system performance or damage to
the heat pump. All field wiring should be installed
by qualified and trained personnel. Refer to the
unit wiring diagram for field connection
requirements.
As factory built, all 208/230 V units are wired for
230 V operation unless the wire for 208 V option is
ordered. For jobsites with a 208 V power supply,
the primary leads on the unit transformer will need
to be changed from 240 V to 208 V. Refer to the
unit wiring diagram for details.
All power connections must be properly
torque to avoid the risk of overheating.
Power wiring to the heat pump should be enclosed
in flexible conduit to minimize the transmission of
vibration from the unit cabinet to the building.
For heat pumps with unit mounted disconnect
switches, field power should be connected to the
marked terminals on the disconnect switch. For
heat pumps without unit mounted disconnect
switches (except for 460 volt units noted below),
power leads are connected to the line (L) side of
the compressor contactor. Always be sure to
connect the ground lead to the ground lug.
460V Wiring Considerations when Pairing
Condensing & Air Handler
Optional Constant Air Flow Motor
A 460V air handler with the Constant Air Flow
Motor option requires a properly sized neutral wire
in addition to the three high voltage wires and the
ground wire. These units employ a 265 V motor
that requires power from one phase of the 460 V
supply and the neutral wire.
Standard Constant Torque Motor
A 460V air handler with the standard Constant
Torque Motor employs a 460 V motor, so in this
case the additional neutral wire is not needed. Be
sure to plan for the inclusion of a neutral wire if
selecting the upgraded constant air flow motor
option on a 460V job.
All blower motors are single phase. Compressor
motors may be either single or three phase.
The power supply ground wire should never
be used as a neutral wire.
8 733 922 118 (2015/01)
- Low Voltage
For heat pumps with constant torque fan motors,
all thermostat wiring is connected to a terminal
block located in the unit electrical box. For heat
pumps with a constant air flow fan motor,
thermostat wiring is connected to a removable
terminal strip located on the ECM motor control
board located in the electrical box. Refer to the
unit wiring diagram for connection details. The
thermostat should be connected to the air
handlers and then from the air handler to the
condensing section (so they are in series with the
thermostat). Note, the low voltage power supply is
located in the air handler.
Never route control wiring through the same
conduit as power supply wiring.
The heat pump can be controlled by most
commonly available single-stage heat pump
thermostats. Note that the reversing valve on the
unit is energized when the unit is in the cooling
mode. Thermostats should be located on an
interior wall away from supply ducts. Avoid
locations subject to direct sunlight, drafts, or
external walls. Thermostat wiring should be 18
AWG. Refer to the installation instructions for the
thermostat for further details.
Exceptionally long runs of thermostat wire
should be avoided to prevent voltage drops in
the control circuit.
The Air Handlers are supplied with a 50 VA control
transformer as standard – this transformer
supplies the low voltage for both the air handler
and condensing section. The VA capacity of the
transformer should be considered when
connecting low voltage accessories to the heat
pump such as thermostats or solenoid valves.
Table #2 shows the VA draw of factory mounted
components in the heat pump. The total VA draw
of the heat pump internal components plus any
attached accessories must be lower than the VA
capacity of the unit control transformer.
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Electrical | 9
Unit Protection Module Safety Features
Exceeding the transformer capacity can
result in low control voltage, erratic unit
operation or damage to the heat pump.
13
Table 2: Low Voltage VA Draw - Condensing
Section
Standard Construction Optional Components
Component
Component
VA
VA
Reversing Valve
Solenoid
Compressor
Contactor
UPM board
Total VA draw
8-9
Internal 2 Way
Motorized Valve
7
6-8
LED Annunciator
1
2
Pump/Valve
Relay
11
12
1
2
3
6-7
4
5
16-19
UNITS CONTROLS - UPM
These heat pumps are designed to be controlled by
a standard 1 heat / 1 cool heat pump thermostat.
The heat pump control circuit operates on 24 VAC
control voltage regardless of the unit supply
voltage.
Compressor operation is controlled by the “Y”
terminal on the heat pump thermostat terminal
block. When “Y” is energized, a signal to start the
compressor is sent to the Unit Protection Module
(UPM). The UPM checks a number of safety
features before then starting the compressor. If
any of the safety features connected to the UPM is
in a fault condition, the UPM will not start the
compressor and will flash a fault code on the red
status LED indicating the nature of the fault.
Additionally the UPM will delay compressor
operation randomly on initial start up (random
start delay) and will prevent the compressor from
restarting with less than 5 minutes of off time (anti
short cycle delay). Once all faults are cleared and
the time delays are satisfied, the UPM will energize
the compressor. The compressor will operate as
long as the thermostat calls for “Y” and there are
no faults. Refer to the troubleshooting chart for
fault diagnostics.
Cooling and Heating Modes
The unit operates in cooling with the reversing
valve energized. When the “O” terminal is
energized, the heat pump will be in the cooling
mode, however, will not be actively cooling until
the “Y” and “G” terminals are also energized. If the
“Y” and “G” terminals are energized without the
“O” terminal, then the heat pump will operate in
the heating mode.
Revised 01-15
6
7
8
9
10
Figure # 2
[1] Board Power Indicator
[2] UPM Status LED Indicator
[3] Water Coil Freeze Protection Temperature
Selection
[4] Air Coil Freeze Protection Temperature
Selection
[5] UPM Board Settings
[6] Water Coil Freeze Connection
[7] Air Coil Freeze Connection
[8] LED Unit Display Connection
[9] 24VAC Power Input
[10] Compressor Contact Output
[11] High Pressure Switch Connection
[12] Call for Compressor Y1
[13] Low Pressure Switch Connection
[14] 24VAC Power Common
[15] Condensate Overflow Sensor
[16]Dry Contact
[17]UPM Ground Standoff
If the unit is being connected to a thermostat
with a malfunction light, this connection is made
at the unit malfunction output or relay.
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10 | Electrical
LV Condensing Section
If the thermostat is provided with a malfunction
light powered off of the common (C) side of the
transformer, a jumper between “R” and “COM”
terminal of “ALR” contacts must be made.
If the thermostat is provided with a malfunction
light powered off of the hot (R) side of the
transformer, then the thermostat malfunction
light connection should be connected directly to
the (ALR) contact on the unit’s UPM board.
Safety controls include the following:
• High pressure switch located in the refrigerant
discharge line and wired across the HPC
terminals on the UPM
• Low pressure switch located in the unit
refrigerant suction line and wired across
terminals LPC1 and LPC2 on the UPM.
UPM Board Dry Contacts are Normally Open
(NO)
•
Water side freeze protection sensor, mounted
close to condensing water coil, monitors
refrigerant temperature between condensing
water coil and expansion valve or capillary
tube. If temperature drops below or remains at
freeze limit trip for 30 seconds, the controller
will shut down the compressor and enter into
a soft lockout condition. The default freeze
limit trip is 26°F, however this can be changed
to 15°F by cutting the R30 or Freeze1 resistor
located on top of DIP switch SW1.
Figure # 3
•
UPM DIP SWITCH DEFAULT POSITION
lockout
4
2
reset
R
Y
alarm
Cont
pulse
test
yes
no
UPM Board Factory Default Settings
TEMP
26°F
LOCKOUT
2
RESET
Y
ALARM
PULSE
TEST
NO
Table 3: UPM Fault Blink Codes
LED Blinks
Fault
Fault Criteria
None
None
All fault conditions
nominal
High Pressure
Refrigerant discharge
pressure has
exceeded 600 PSIG
Low Pressure
Refrigerant suction
pressure has fallen
below 40 PSIG
3
Water Coil
Freeze
Condition
Refrigerant
temperature to the
water coil has fallen
below 26°F for 30
seconds
4
Condensate
Overflow
5
Air Coil Freeze
Condition
6
Brown Out
1
2
Not Applicable
Freeze sensor contact
jumper not installed
Control voltage has
fallen below 18 VAC
Air Coil freeze protection sensor is not factory
mounted for split systems, the supplied jumper
must be connected across the terminals if no
freeze sensor is to be installed in the field. Unit
will not operate without a field-installed freeze
sensor or jumper.
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Subject to change without prior notice
LV Condensing Section
LV Condensing Section
The UPM Board includes the following features:
• ANTI-SHORT CYCLE TIMER: 5 minute delay on
Electrical | 11
•
provides a quick visual indication of whether or not
a heat pump is energized or if it has locked out on a
fault. The LED kit is mounted to the electrical corner
post of the heat pump and employs high intensity
LEDs for better visibility. The LED kit will exactly
mirror the blink codes on the UPM board (refer to
the blink code table in the UPM sequence of
operation).
break timer to prevent compressor short cycling.
•
RANDOM START: Each controller has an unique
random start delay ranging from 270 to 300 seconds
on initial power up to reduce the chance of multiple
unit simultaneously starting at the same time after
power up or after a power interruption, thus
avoiding creating large electrical spike.
•
LOW PRESSURE BYPASS TIMER: If the
compressor is running and the low pressure switch
opens, the controller will keep the compressor ON
for 120 seconds. After 2 minutes if the low pressure
switch remains open, the controllers will shut down
the compressor and enter a soft lockout. The
compressor will not be energized until the low
pressure switch closes and the anti-short cycle time
delay expires. If the low pressure switch opens 2-4
times in 1 hour, the unit will enter a hard lockout. In
order to exit hard lockout power to the unit would
need to be reset.
•
•
Operation of unit in test mode can lead to
accelerated wear and premature failure of
components. The "TEST" switch must be set
back to "NO" after troubleshooting/
servicing.
•
BROWNOUT/SURGE/POWER
INTERRUPTION PROTECTION: The brownout
MALFUNCTION OUTPUT: Alarm output is
Normally Open (NO) dry contact. If pulse is selected
the alarm output will be pulsed. The fault output will
depend on the dip switch setting for "ALARM". If it
is set to "CONST", a constant signal will be
produced to indicate a fault has occurred and the
unit requires inspection to determine the type of
fault. If it is set to "PULSE", a pulse signal is
produced and a fault code is detected by a remote
device indicating the fault. See L.E.D Fault
Indication below for blink code explanation. The
remote device must have a malfunction detection
capability when the UPM board is set to "PULSE".
TEST DIP SWITCH: A test dip switch is provided
to reduce all time delays settings to 10 seconds
during troubleshooting or verification of unit
operation.
protection in the UPM board will shut does the
compressor if the incoming power falls below 18
VAC. The compressor will remain OFF until the
voltage is above 18 VAC and ANTI-SHORT CYCLE
TIMER (300 seconds) times out. The unit will not go
into a hard lockout.
•
LED ANNUNCIATOR: This optional LED kit
FREEZE SENSOR: The default setting for the
freeze limit trip is 26°F (sensor number 1); however
this can be changed to 15°F by cutting the R30
resistor located on top of the DIP switch SW1. The
UPM controller will constantly monitor the
refrigerant temperature with the sensor mounted
close to the condensing water coil between the
thermal expansion valve and water coil. If
temperature drops below or remains at the freeze
limit trip for 30 seconds, the controller will shut the
compressor down and enter into a soft lockout
condition. Both the status LED and the Alarm
contact will be active. The LED will flash (three (3)
times) the code associated with this alarm
condition. If this alarm occurs 2 times (or 4 if Dip
switch is set to 4) within an hour the UPM controller
will enter into a hard lockout condition.
It is recommended to have a flow switch to
prevent the unit from running if water flow is lost.
•
INTELLIGENT RESET: If a fault condition is
initiated, the 5 minute delay on break time period is
initiated and the unit will restart after these delays
expire. During this period the fault LED will indicate
the cause of the fault. If the fault condition still
exists or occurs 2 or 4 times (depending on 2 or 4
setting for Lockout dip switch) before 60 minutes,
the unit will go into a hard lockout and requires a
manual lockout reset.
If 24 VAC output is needed R must be wired to
ALR-COM terminal; 24 VAC will be available o
the ALR-OUT terminal when the unit is in the
alarm condition.
•
LOCKOUT RESET: A hard lockout can be reset by
turning the unit thermostat off and then back on
when the “RESET” dip switch is set to “Y” or by
shutting off unit power at the circuit breaker when
the “RESET” dip switch is set to “R”.
Revised 01-15
8 733 922 118 (2015/01)
12 | Electrical
LV Condensing Section
Table 4: Refrigerant Charge, Line Sizing and Capacity Multiplier1
SYSTEM
MODEL
Factory
R410A
Charge (Oz)2
Refrigerant Line O.D. Size (Based on Equivalent Line Length)3
35 FT.
25 FT.2
50 FT.
Suct. Line
75 FT
Riser Max.4
LIQ.
SUC.
LIQ.
SUC.
LIQ.
SUC.
LIQ.
SUC.
LV018
40
3/8
3/4
3/8
3/4
3/8
3/4
3/8
3/4
5/8
LV024
44
3/8
3/4
3/8
3/4
3/8
3/4
3/8
7/8
5/8
LV030
52
3/8
3/4
3/8
3/4
3/8
3/4
3/8
7/8
3/4
LV036
61
3/8
3/4
3/8
3/4
3/8
7/8
3/8
7/8
3/4
LV042
58
3/8
3/4
3/8
3/4
3/8
7/8
1/2
7/8
7/8
LV048
59
3/8
3/4
3/8
7/8
3/8
7/8
1/2
1-1/8
7/8
LV060
93
3/8
7/8
1/2
7/8
1/2
1-1/8
1/2
1-1/8
7/8
LV070
90
3/8
7/8
1/2
1-1/8
1/2
1-1/8
1/2
1-1/8
7/8
CAPACITY MULTIPLIER
1.00
.995
0.990
0.980
Example 1:
Model LV018 with 50ft of equivalent length of 3/8” O.D Liquid Line and factory supplied filter drier. Total system charge = Factory charge +/adjustment for larger liquid line diameter and additional liquid line length + filter drier adjustment. Total System Charge = 40 oz - (25ft x .6 oz/ft) +
(50ft x .60 oz/ft) + 6 oz = 61 oz. Add 21 oz of R410A refrigerant. After adding estimated additional charge, adjust final charge according to
subcooling and superheat measurements. See section on charging according to subcooling and superheat.
Example 2:
Model LV036 with 45ft of equivalent length of 3/8” O.D Liquid Line and factory supplied filter drier. Estimated Total System Charge = Factory
charge +/- liquid line length adjustment + filter drier adjustment. Estimated Total System Charge = 61 oz + ([45ft - 25ft] x .60 oz/ft) + 6 oz = 79 oz.
Estimate an additional 18 oz of R410A refrigerant is required. After adding estimated additional charge, adjust final charge according to subcooling
and superheat measurements. See section on charging according to subcooling and superheat.
Example 3:
Model LV060 with 35ft of equivalent length of 1/2” O.D Liquid Line and factory supplied filter drier. Total system charge = Factory charge - (25ft x
0.6 oz/ft) + (35ft x 1.15 oz/ft) + filter drier adjustment. Total System Charge = 93 oz - 15 + 40 + 9 oz = 127 oz. Add 34 oz of R410A refrigerant. After
adding estimated additional charge, adjust final charge according to subcooling and superheat measurements. See section on charging according
to subcooling and superheat.
Notes:
1. Liquid and suction line sizes should be sized according to table, not according to king valve connection size.
2. Factory Charge is based on 25 ft of lineset with lineset diameter according to table. Charge adjustments will need to be made for linesets of
differing length and/or diameters. Additional charge must also be added for factory supplied filter drier. All charge rates MUST ALWAYS to be
confirmed and adjusted if necessary by subcooling and superheat measurements (even with a 25 ft lineset and default factory charge). See section
on charging according to subcooling and superheat.
3. Next diameter size up should be used if equivalent length is longer than shown (75 ft is max)
4. Suction line max riser diameter is typically sized to meet minimum of 1,250 FPM refrigerant velocity for proper oil return.
5. With 1/2” liquid lines it is recommended to place units as close as practical (minimizing the increased refrigerant volume imposed by the larger
line) for maximum compressor life.
Table 5: Liquid Line Charge Per Linear Foot
Liquid line Size, O.D.
R410A oz per foot
8 733 922 118 (2015/01)
1/4
5/16
3/8
1/2
5/8
.25
.44
.60
1.15
1.95
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Electrical | 13
Table 6: Additional Charge for factory supplied Filter Drier
Filter Drier Description
Charge –
Filter Drier oz
LV018
Filter Drier, BiFlow, R410A, 8 cu in, 3/8 ODF
6
LV024
Filter Drier, BiFlow, R410A, 8 cu in, 3/8 ODF
6
LV030
Filter Drier, BiFlow, R410A, 8 cu in, 3/8 ODF
6
LV036
Filter Drier, BiFlow, R410A, 8 cu in, 3/8 ODF
6
LV042
Filter Drier, BiFlow, R410A, 8 cu in, 3/8 ODF
6
LV048
Filter Drier, BiFlow, R410A, 16 cu in, 5/8 ODF
9
LV060
Filter Drier, BiFlow, R410A, 16 cu in, 5/8 ODF
9
LV070
Filter Drier, BiFlow, R410A, 16 cu in, 5/8 ODF
9
MODEL
Notes:
1. All units re quire a bi-flow filter drier. Filter drier must be UL listed for R410A with a maximum working pressure of 680 psi. Substitute driers are
permissible assuming drier meets these specifications.
2. Final Charge must be adjusted for filter drier - refer to table for charge adjustment.
Table 7: Service Valve Connection
Service Valve Connection Sizes
SYSTEM
LIQ.
SUC.
MODEL
LV018
LV024
LV030
LV036
LV042
LV048
LV060
LV070
Revised 01-15
3/8
3/4
3/8
3/4
3/8
3/4
3/8
3/4
3/8
3/4
3/8
3/4
3/8
7/8
3/8
7/8
8 733 922 118 (2015/01)
14 | Options
LV Condensing Section
OPTIONS
Automatic Flow Control Valve
A number of factory installed options are available
on Condensing Sections. The following details the
purpose, function and components of each option.
This factory installed option provides controlled
flow over a wide range of working pressures and
temperatures - limiting the water/fluid flow to the
recommended rate (roughly 3 gpm / ton) for
optimum system efficiency. The valve prevents
excessive flow - protecting the heat exchanger
surface from erosion and also minimizing the
number of valves needed for unit and building /
system balancing. The valve is designed to resist
clogging and have a long life without maintenance;
however, if maintenance is needed, the valve
cartridge can easily be unscrewed and replaced.
Unit Mounted Non-Fused Disconnect
Switch
The heat pumps can be supplied with an optional
unit mounted disconnect switch mounted to the
electrical corner post of the unit.
Field electrical wiring is connected to the switch
and the switch then routes power to the heat
pump electrical box. When the switch is in the
“OFF” position, the heat pump electrical box is
completely de-energized.
Internal 2-Way Water Valve
In many applications, including variable pumping
and well water installations, a motorized water
valve is required on the heat pump water circuit.
This water valve can be factory mounted and wired
internally to the unit.
The internal water valve option features a 24VAC
motorized water valve rated to 450 psig working
pressure. This valve is wired to open on a
thermostat call for compressor operation (heating
or cooling) and will remain open as long as the
thermostat calls. The valve can remain seated with
up to 20 psi of back pressure on all sizes.
The valve consists of two main parts: the valve
body and the actuator. The valve body is brazed
into the leaving water line of the heat pump and is
a permanent part of the unit. The valve actuator
can be easily removed from the valve body for
service.
Refer to the water side pressure drop table in the
operating temperatures and pressures section of
this manual to determine the appropriate pressure
drop across the heat pump with and without the
water valve option.
Note that the 2-Way Water Valve option will add
additional pressure drop between the water in
and water out connections of the heat pump.
Note that this water valve cannot be used as an
isolation valve.
8 733 922 118 (2015/01)
LED Annunciator
This heat pump can be equipped with an optional
LED annunciator kit. This LED kit can provide a
quick visual indication of whether or not a heat
pump is energized and if it has locked out on a
fault. The LED kit is mounted to the electrical
corner post of the heat pump and employs high
intensity LED’s for better visibility. The LED kit will
exactly mirror the LED blink codes on the UPM
board (refer to the blink code table in the UPM
sequence of operation).
Flow Proving Switch
This heat pump can be equipped with an optional
flow proving switch. This device senses a pressure
drop across the water side of the condenser coil
indicating water flow. When the pressure drop
rises to five feet of head, the flow proving switch
will enable the compressor. If the pressure drop
across the condenser does not reach the required
value, then the unit compressor is disabled.
APPLICATION CONSIDERATIONS
Well Water Systems
Copper is adequate for ground water that is not
high in mineral content. Should your well driller
express concern regarding the quality of the well
water available or should any known hazards exist
in your area, we recommend proper testing to
assure the well water quality is suitable for use
with water source equipment. In conditions
anticipating moderate scale formation or in
brackish water a cupro-nickel heat exchanger is
recommended. In well water applications water
pressure must always be maintained in the heat
exchanger. This can be accomplished with either a
control valve or a bladder type expansion tank.
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Application Considerations | 15
When using a single water well to supply both
domestic water and the heat pump, care must be
taken to ensure that the well can provide sufficient
flow for both. In well water applications a slow
closing solenoid valve must be used to prevent
water hammer. Solenoid valves should be
connected across Y1 and C1 on the interface board
for all. Make sure that the VA draw of the valve
does not exceed the contact rating of the
thermostat.
Supply Air
Refrigerant
Lines
Return Air
Elec
tric
Pane al
l
Air
Han
dler
Stan
d
Condensate Line
Figure # 4 Example System Set-up
Cooling Tower/Boiler Systems
The cooling tower and boiler water loop
temperature should be maintained between 50° F
to 110 ° F to assure adequate cooling and heating
performance.
Revised 01-15
In the cooling mode, heat is rejected from the unit
into the water loop. A cooling tower provides
evaporative cooling to the loop water thus
maintaining a constant supply temperature to the
unit. When utilizing open cooling towers, chemical
water treatment is mandatory to ensure the water
is free from corrosive elements. A secondary heat
exchanger (plate frame) between the unit and the
open cooling tower may also be used.
8 733 922 118 (2015/01)
16 | Application Considerations
LV Condensing Section
It is imperative that all air be eliminated from the
closed loop side of the heat exchanger to protect
against fouling. In the heating mode, heat is
absorbed from the water loop. A boiler can be
utilized to maintain the loop at the desired
temperature.
Pressure/temperature ports are recommended in
both supply and return lines for system flow
balancing. Water flow can be accurately set by
measuring the water-to-refrigerant heat
exchanger’s water side pressure drop.
See operating temperatures and pressures
for water flow vs. pressure drop
information.
Water in piping exposed to extreme low
ambient temperatures is subject to
freezing.
No unit should be connected to the supply or
return piping until the water system has been
completely cleaned and flushed to remove any dirt,
piping chips or other foreign material. Supply and
return hoses should be connected together during
this process to ensure the entire system is
properly flushed.
Consult the specification sheets for piping
sizes. Teflon tape sealer should be used
when connecting to the unit to protect
against leaks and possible heat exchanger
fouling.
Do not overtighten the connections. Flexible hoses
should be used between the unit and the rigid
system to avoid damage from vibration. Ball valves
should be installed in the supply and return lines
for unit isolation and unit water flow balancing.
After the cleaning and flushing has taken place the
unit may be connected to the water loop and
should have all valves wide open. (Figure #5)
Note: Diagram shows typical
installation and is for illustration
purposes only. Ensure access to Heat
Pump is not restricted.
Figure # 5
[1]
[2]
[3]
[4]
[5]
[6]
Line voltage disconnect (unit)
Low voltage control connection
P/T ports (optional)
Hose kits (optional)
Ball valves
Supply and return line of central system
8 733 922 118 (2015/01)
[7] Flex duct connection
[8] Hanging bracket assembly
[9] Threaded rod
[10] Hanging bracket assembly
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Application Considerations | 17
Geothermal Systems
Each condensing section comes with an insulated
water-to-refrigerant heat exchanger making it
suitable for geothermal applications. Closed loop
and pond applications require specialized design
knowledge. No attempt at these installations
should be made unless the dealer has received
specialized training. Utilizing the Ground Loop
Pumping Package (GLP), makes the
installation easy. Anti-freeze solutions are utilized
when low evaporating conditions are expected to
occur. Refer to the GLP installation manuals for
more specific instructions. (Figure #6)
Note: Diagram shows typical
installation and is for illustration
purposes only. Ensure access to Heat
Pump is not restricted.
Figure # 6
[1] Line voltage disconnect (unit)
[2] Flex duct Connection
[3] Low voltage control connection
[4] Line voltage connection (unit)
[5] P/T ports
[6] Vibration pad
[7] Condensate drain connection
[8] Ground loop connection kit
[9] Ground loop pumping package
[10] Polyethylene with insulation
[11] Line voltage disconnect (electric heater)
Revised 01-15
8 733 922 118 (2015/01)
18 | System Checkout
LV Condensing Section
SYSTEM CHECKOUT
UNIT START-UP
After completing the installation, and before
energizing the unit, the following system checks
should be made:
• Verify that the supply voltage to the heat pump
is in accordance with the nameplate ratings.
• Make sure that all electrical connections are
tight and secure.
• Check the electrical fusing and wiring for the
correct size.
1. Put the UPM board in “test” mode.
2. Set the thermostat to the highest setting.
3. Set the thermostat system switch to “COOL”,
and the fan switch to the “AUTO” position. The
reversing valve solenoid should energize. The
compressor and fan should not run.
4. Reduce the thermostat setting approximately 5
degrees below the room temperature.
5. Verify the heat pump is operating in the cooling
mode.
6. Turn the thermostat system switch to the
“OFF” position. The unit should stop running
and the reversing valve should de energize.
7. Leave the unit off for approximately (5)
minutes to allow for system equalization.
8. Turn the thermostat to the lowest setting.
9. Set the thermostat switch to “HEAT”.
10. Increase the thermostat setting approximately
5 degrees above the room temperature.
11. Verify the heat pump is operating in the heating
mode.
12. Set the thermostat to maintain the desired
space temperature.
13. Check for vibrations, leaks, etc.
Ensure cabinet and Electrical Box are
properly grounded.
•
•
•
•
•
•
Verify that the low voltage wiring between the
thermostat and the unit is correct.
Verify that the water piping is complete and
correct.
Check that the water flow is correct, and
adjust if necessary.
Check the blower for free rotation, and that it
is secured to the shaft.
Verify that vibration isolation has been
provided.
Unit is serviceable. Be certain that all access
panels are secured in place.
Considerations:
1. Always check incoming line voltage power
supply and secondary control voltage for
adequacy. Transformer primaries are dual
tapped for 208 and 230 volts. Connect the
appropriate tap to ensure a minimum of 18
volts secondary control voltage. 24 volts is
ideal for best operation.
2. Long length thermostat and control wiring
leads may create voltage drop. Increased wire
gauge or up-sized transformers may be
required to ensure minimum secondary voltage
supply.
3. The guidelines for wiring between a thermostat
and the unit are: 18 GA up to 60 foot, 16 GA up
to 100 ft and 14 GA up to 140 ft.
4. Do not apply additional controlled devices to
the control circuit power supply without
consulting the factory. Doing so may void
equipment warranties.
5. Check with all code authorities on
requirements involving condensate disposal/
over flow protection criteria.
8 733 922 118 (2015/01)
MAINTENANCE
1. Filter changes or cleanings are required at
regular intervals. The time period between
filter changes will depend upon type of
environment the equipment is used in. In a
single family home, that is not under
construction, changing or cleaning the filter
every 60 days is sufficient. In other
applications such as motels, where daily
vacuuming produces a large amount of lint,
filter changes may need to be as frequent as
biweekly.
Equipment should never be used during
construction due to likelihood of wall board
dust accumulation in the air coil of the
equipment which permanently affects the
performance and may shorten the life of the
equipment.
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
2. An annual “checkup” is recommended by a
licensed refrigeration mechanic. Recording the
performance measurements of volts, amps,
and water temperature differences (both
heating and cooling) is recommended. This
data should be compared to the information on
the unit’s data plate and the data taken at the
original startup of the equipment.
3. Lubrication of the blower motor is not
required, however may be performed on some
motors to extend motor life. Use SAE-20 nondetergent electric motor oil.
4. The condensate drain should be checked
annually by cleaning and flushing to ensure
proper drainage.
5. Periodic lockouts almost always are caused by
air or water flow problems. The lockout
(shutdown) of the unit is a normal protective
measure in the design of the equipment. If
continual lockouts occur call a mechanic
immediately and have them check for: water
flow problems, water temperature problems,
air flow problems or air temperature problems.
Use of the pressure and temperature charts for
the unit may be required to properly determine
the cause.
Maintenance | 19
Table 8: Water Side Pressure Drop
MODEL
LV018
LV024
LV030
LV036
LV042
LV048
LV060
LV070
Water
Flow
Rate
(GPM)
Water Side
Pressure Drop
with out Internal
Valve (PSI)
Water Side
Pressure
Drop with
Internal
Valve (PSI)
2.5
4
5
3
4
6
4
6
8
4.5
6
9
5
8
11
6
8
12
7.5
10
15
9
12
18
1.1
2.7
4.0
1.7
2.8
5.8
2.0
4.2
7.0
1.6
2.6
5.4
2.0
4.6
8.2
0.8
1.4
2.8
1.4
2.3
4.8
2.0
3.4
7.0
2.1
5.2
8.0
2.0
3.4
7.2
2.6
5.6
9.6
2.4
4.0
8.6
3.0
7.2
13.0
1.4
2.5
5.4
2.4
4.1
8.8
3.4
5.9
12.7
All values based upon pure water at 70° F.
Revised 01-15
8 733 922 118 (2015/01)
20 | Unit Check-Out Sheet
LV Condensing Section
UNIT CHECK-OUT SHEET
Customer Data
Customer Name _____________________________________________
Address ______________________________________________________
_______________________________________________________________
Phone _______________________________________________________
Date ___________________________________
Unit Number ___________________________
Unit Nameplate Data
Unit Make _________________________________________
Model Number ____________________________________
Serial Number ____________________________________
Refrigerant Charge (oz) __________________________
Compressor: RLA ____________________
LRA ___________________________
Blower Motor: FLA (or NPA) ___________
HP ____________________________
Maximum Fuse Size (Amps) ____________
Maximum Circuit Ampacity _____________
Operating Conditions
Entering / Leaving Air Temp
Cooling Mode
_______________ / _____________
Heating Mode
_______________ / _____________
Entering Air Measured at:
______________________________
______________________________
Leaving Air Measured at:
______________________________
______________________________
Entering / Leaving Fluid Temp
_______________ / _____________
_______________ / _____________
Fluid Flow (gpm)
______________________________
______________________________
Compressor Volts / Amps
_______________ / _____________
_______________ / _____________
Blower Motor Volts / Amps
_______________ / _____________
_______________ / _____________
Source Fluid Type
______________________________
______________________________
Fluid Flow (gpm)*
______________________________
______________________________
Fluid Side Pressure Drop*
______________________________
______________________________
Suction / Discharge Pressure (psig)*
Suction / Discharge Temp*
Suction Superheat*
_______________ / _____________
_______________ / _____________
_______________ / _____________
______________________________
_______________ / _____________
______________________________
8 733 922 118 (2015/01)
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Unit Check-Out Sheet | 21
Customer Data
Entering TXV / Cap Tube Temp*
Liquid Subcooling*
______________________________
______________________________
______________________________
______________________________
* Required for Troubleshooting ONLY
Auxiliary Heat
Unit Make __________________________________
Model Number: ______________________________
Max Fuse Size (Amps) _______________________
Serial Number _____________________________
Volts / Amps _______________________________
Entering Air Temperature _____________________
Bosch Group
Leaving Air Temperature ______________________
601 NW 65th Court
Scan the QR code and attach picture of this form with the
information requested.
Revised 01-15
Fort Lauderdale, FL 33309
Phone: (866) 642-3198
8 733 922 118 (2015/01)
22 | Troubleshooting
LV Condensing Section
TROUBLESHOOTING
Table 9: UNIT TROUBLESHOOTING
Problem
Mode
Cooling
Check
Possible Cause
Action
High Pressure fault - no
or low water flow
Check water valves and/or pumps
for proper operation. Check for
water coil blockage.
High Pressure fault - high
water temperature
Check water temperature - is it in
range?
High Pressure fault fouled or scaled water
coil
Check for proper flow rate and
water temperature, but low water
side temp rise in cooling
Heating
X
Is fault LED Blinking
1 time?
Check fan motor for proper
operation.
High Pressure fault - no
or low air flow
X
Check air filter
Inspect air coil for dirt/debris
Check duct work - are dampers
closed or blocked?
Check fan motor for proper
operation.
Low Pressure fault - no
or low air flow
X
Inspect air coil for dirt/debris
Check duct work - are dampers
closed or blocked?
No compressor
operation but fan runs
Is fault LED Blinking
2 times?
X
X
8 733 922 118 (2015/01)
Check air filter
Is fault LED Blinking
3 times?
Low Pressure fault - low
refrigerant
Check refrigerant pressure with
gauge set
Low Pressure fault - no
or low water flow
Check water valves and/or pumps
for proper operation. Check for
water coil blockage.
75Unit
Check for proper flow rate and
water temperature, but low water
side temp drop in heating.
Low Pressure fault - low
refrigerant
Check refrigerant pressure with
gauge set
Freeze fault, water coil no or low water flow
Check water valves and/or pumps
for proper operation. Check for
water coil blockage.
Freeze fault - low water
temperature
Check water temperature - is it
below 40° entering? If heat pump is
connected to a closed loop with
antifreeze check that the "FREEZE
1" resistor on the UPM board has
been cut to set the unit to
antifreeze mode (see UPM features
on pages 15-17).
Freeze fault - low
refrigerant
Check refrigerant pressure with
gauge set
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Troubleshooting | 23
Table 9: UNIT TROUBLESHOOTING
Problem
Mode
Check
Action
Condensate fault - poor
drainage
Check condensate pan for high
water level. Check drain line for
blockages, double trapping or
inadequate trapping.
Condensate fault blocked return air
Check condensate pan for high
water level. Check air filter and
return air duct work for blockage.
Check that there is adequate space
between the return air opening and
walls or other obstructions on free
return applications.
Brown out fault - low
supply voltage
Check primary voltage - insure it is
within the limits listed on the unit
data plate.
Brown out fault overloaded control
circuit
Check control voltage - if it is below
18 V check accessories connected
to the unit and insure that they do
not exceed the VA draw shown on
page 11.
Brown out fault - bad
thermostat connection
Check that thermostat wiring is
proper gauge and length, that it is
not damaged and that all
connections at the thermostat and
heat pump are secure.
Is fault LED Blinking
4 times?
X
X
Possible Cause
X
Is fault LED Blinking
5 times?
Check fan motor for proper
operation.
No compressor
operation but fan runs
Freeze fault, air coil - no
or low air flow
X
Revised 01-15
X
No fault LED contactor not
energized
Inspect air coil for dirt/debris
Check duct work - are dampers
closed or blocked?
Is fault LED Blinking
6 times?
X
Check air filter
Freeze fault, air coil blocked return air
Check that there is adequate space
between the return air opening and
walls or other obstructions on free
return applications.
Freeze fault, air coil - low
refrigerant
Check refrigerant pressure with
gauge set.
Thermostat not calling
for compressor
operation
Ensure that the thermostat is on
and calling for "Y"
Bad thermostat
connection
Check "Y" connection from
thermostat. Insure that there is 24
VAC between "Y" and "C".
Loose wire to contactor
coil
Check wiring - insure that there is
24 VAC across the contactor coil.
Burned out contactor
coil
Test contactor with 24VAC
(between "R" and "C"). Ohm
contactor coil - an open circuit
indicates a burned coil.
8 733 922 118 (2015/01)
24 | Troubleshooting
LV Condensing Section
Table 9: UNIT TROUBLESHOOTING
Problem
No compressor
operation but fan runs
Mode
X
Check
X
X
Action
Open compressor
overload
Check for supply voltage at the load
side of the contactor. For 3 phase
models check phase rotation and
voltage at all 3 phases.
Poor wiring connections
Look for signs of heat on the wiring
insulation. Check that all wiring
connections are secure and
properly torqued.
Burned out compressor
Does compressor hum when power
is applied? If not check the
resistance of the compressor
windings using the values shown in
the compressor characteristics
chart. Note that the compressor
must be cool (70° F) when checking
the windings.
Bad thermostat
connection / faulty
thermostat
Check thermostat and wiring.
Check unit terminal block for 24
VAC between "Y" and "C" and "G"
and "C".
Low or no supply power
Insure that the supply voltage to the
unit is with in the range shown on
the unit data plate.
Faulty control
transformer
Check for 24 VAC between "R" and
"C" on the unit terminal block. For
75 and 100 VA transformers, check
that the transformer circuit breaker
has not tripped. Check low voltage
circuit for overload conditons or
short circuits before replacing the
transformer.
Faulty motor
check supply voltage from the fan
relay to the motor. Check that all
motor wires are secure. With
power off spin the motor shaft noise, resistance or uneven motion
can be signs of motor failure.
No fan operation signal
Check for 24 VAC across the fan
relay coil. Check all wiring
connections.
Bad fan relay
If the relay coil is energized but the
relay does not pull in, check the
resistance across the relay coil - an
open circuit is an indicator of a
faulty relay.
No fan operation signal
Check for 24 VAC between "G" and
"C". Check all wiring connections.
Loose wiring
Check all wiring connections at
motor and control box.
Faulty motor
Check supply voltage to the motor.
Check that all motor wires are
secure. With power off spin the
motor shaft - noise, resistance or
uneven motion can be signs of
motor failure.
No fault LED contactor energized
Power LED on
No compressor or fan
operation
Possible Cause
X
Power LED off
Fan relay energized
No fan operation PSC motor
X
X
Fan relay not
energized
No fan operation constant torque
motor
8 733 922 118 (2015/01)
X
X
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Troubleshooting | 25
Table 9: UNIT TROUBLESHOOTING
Problem
No fan operation constant airflow
motor
Mode
X
Check
Possible Cause
Action
No fan operation signal
Check for 24 VAC between "G" and
"C". Check all wiring connections.
Make sure that the thermostat
connection plug is securely
connected.
Loose wiring
Check all wiring connections at
motor and control box. Check that
power and control harnesses are
securely connected.
Interface board
problems
Make sure that the interface board
is not damged and that all DIP
switches are in the proper
configuration (refer to the blower
performance tables).
Faulty motor
Check supply voltage to the motor.
Check that all motor wires are
secure. Move the "TEST" DIP switch
to "ON" and the other switches to
"OFF" on the "ADJUST" switch block
on the interface board - the motor
should run at 70% torque whrn "G"
is called. With power off spin the
motor shaft - noise, resistance or
uneven motion can be signs of
motor failure.
Faulty solenoid
Check that the reversing valve
solenoid is receiving 24 VAC. If so,
check the resistance of the solenoid
- an open circuit may indicate a
burned out solenoid.
Miswired/faulty
thermostat
Check that the reversing valve
theromstat wire is connected to the
"O" terminal of the thermostat.
Check for a contact closure
between "O" and "R".
Loose wire on "O"
terminal
Check that the wires from the
thermostat to the unit are securely
connected and that the wires from
the electrical box to the reversing
valve are connected.
Dirty Filter
Replace filter.
Fan speed too low
Consult blower performance table
and increase fan speed if possible.
Excessive duct pressure
drop
Consult blower performance table
and increase fan speed if possible.
Air flow too high
Fan speed setting too
high
Consult blower performance table
and reduce fan speed if possible.
High or low water
temperature
Inlet water temperature
out of range
Check unit capacity vs. water
temperature.
Air leakage
Leaky duct work
Inspect duct work.
Loss of refrigeration
capacity
Low refrigerant
Check refrigerant pressures with
gauge set.
X
Reversing valve
solenoid energized
Unit not shifting into
cooling
X
Reversing valve
solenoid not
energized
Excessively cold
supply air
temperature in
cooling or excessively
hot supply air
temperature in
heating
Excessively warm
supply air
temperature in
cooling and/or
excessively cool air in
heating
Revised 01-15
X
X
X
Reduced air flow
X
8 733 922 118 (2015/01)
26 | Troubleshooting
LV Condensing Section
Table 9: UNIT TROUBLESHOOTING
Problem
High humidity
Mode
Check
Possible Cause
Action
Air flow too high
Fan speed setting too
high
Consult blower performance table
and reduce fan speed if possible.
Loss of refrigeration
capacity
Low refrigerant
Check refrigerant pressures with
gauge set.
Unit oversized
Check unit performance against
building load calculations.
Poor thermostat location
Make sure that thermostat is not
located by a supply air duct .
Poor duct work/grille
design
Insure duct work and grilles are
properly sized for unit air flow.
Fan speed setting too
high
Consult blower performance table
and reduce fan speed if possible.
Unit not mounted on full
vibration pad
Mount unit on a vibration pad (see
page 7).
Unit not connected with
flexible conduit, water
lines and/or duct work
Install unit in accordance with
instructions on pages 6-8.
Unit cabinet touching
wall or other building
component
Adjust unit location to avoid unit
touching structure.
High water temperature
or low water flow rate
elevating head pressure
Increase water flow rate and/or
reduce water temperature if
possible.
Scaled or fouled water
coil elevating heat
pressure
Clean/descale water coil.
X
Short cycling
Air noise
X
X
Structure bourne
noise
Objectionable noise
levels
X
Compressor noise
Low air flow elevating
head pressure
X
X
8 733 922 118 (2015/01)
X
Water hammer
Fast closing valves
installed
Subject to change without prior notice
Check filter.
Increase fan speed.
change valves to slow-close type.
LV Condensing Section
LV Condensing Section
Operating Temperatures and Pressures | 27
OPERATING TEMPERATURES AND
PRESSURES
OPERATING DATA
MODEL
ENTERING
WATER
WATER
FLOW GPM
TEMP, ˚F
30˚
40˚
50˚
LV018
60˚
70˚
80˚
90˚
100˚
COOLING
HEATING
WATER
SUCTION DISCHARGE
SUCTION
PRESSURE PRESSURE TEMP RISE, AIR TEMP PRESSURE
˚F
DROP, ˚F
PSIG
PSIG
PSIG
3
65-80
282-344
6-7
14-17
5
73-89
294-359
3-4
15-18
3
121-148
184-225
17-21
18-22
80-98
299-365
7-9
16-20
5
117-143
167-204
10-13
19-23
89-108
311-380
4-5
17-21
3
123-151
222-271
17-20
17-21
95-116
315-385
9-11
19-23
5
119-145
202-247
10-12
18-23
105-128
329-402
5-7
20-24
3
125-153
260-318
16-19
17-21
109-133
332-406
11-13
21-26
5
120-147
237-289
10-12
18-22
121-148
346-423
6-8
22-27
3
127-155
298-365
15-19
17-20
124-151
349-427
12-15
23-28
5
122-149
271-331
9-11
18-21
138-168
364-444
7-9
25-30
3
129-158
336-411
14-18
16-20
138-169
366-447
14-17
26-31
5
124-152
306-374
9-11
17-21
154-188
381-466
8-10
27-33
3
131-160
374-458
14-17
16-19
153-187
383-468
16-16
28-34
5
126-154
340-416
8-10
17-20
170-208
399-487
9-12
29-36
3
133-162
413-504
13-16
15-19
5
128-156
375-458
8-10
16-20
72-87
296-361
5-6
21-25
5
30˚
40˚
50˚
LV024
60˚
70˚
80˚
90˚
100˚
DISCHARGE WATER
PRESSURE
TEMP
AIR TEMP
PSIG
DROP, ˚F RISE, ˚F
7
75-92
301-368
3-4
22-26
5
114-139
155-190
14-17
22-27
88-107
314-384
6-7
24-29
7
108-132
147-180
10-12
23-28
92-112
321-392
4-5
25-30
5
116-142
192-234
13-16
21-26
104-127
333-407
7-9
27-33
7
111-135
182-222
9-12
22-27
109-133
340-415
5-6
28-34
5
119-146
228-279
13-16
21-26
120-146
352-430
8-10
30-37
7
113-138
217-265
9-11
22-27
125-153
359-439
6-7
32-39
5
122-149
264-323
13-15
20-25
136-166
371-453
9-12
33-41
7
116-142
251-307
9-11
21-26
142-174
378-462
7-8
35-43
5
125-152
301-368
12-15
20-24
152-185
389-476
11-13
36-44
7
118-145
286-349
9-11
21-26
159-194
397-485
8-9
38-47
5
127-156
337-412
12-15
19-24
168-205
408-499
12-15
39-48
7
121-148
320-392
9-10
20-25
176-215
416-509
8-10
41-51
5
130-159
374-457
12-14
19-23
7
124-151
355-434
8-10
20-24
This chart shows approximate temperatures and pressures for a unit in good repair. The values shown are meant as a guide only and
should not be used to estimate system charge. This chart assumes rated air flow and 80º d.b./67º w.b. entering air temperature in cooling,
70º d.b. entering air temperature in heating. Heating data at entering fluid temperatures below 50º assumes the use of antifreeze. As a
result of continuing research and development, specifications are subject to change without notice.
Revised 01-15
8 733 922 118 (2015/01)
28 | Operating Temperatures and Pressures
LV Condensing Section
OPERATING DATA
MODEL
ENTERING
WATER
WATER
FLOW GPM
TEMP, ˚F
30˚
40˚
50˚
LV030
60˚
70˚
80˚
90˚
100˚
COOLING
HEATING
WATER
SUCTION DISCHARGE
SUCTION
PRESSURE PRESSURE TEMP RISE, AIR TEMP PRESSURE
˚F
DROP, ˚F
PSIG
PSIG
PSIG
3.5
73-89
266-325
5-6
15-18
7.5
77-94
272-333
3-4
16-19
3.5
117-143
189-231
14-17
18-22
86-105
279-341
6-7
17-21
7.5
112-137
178-217
8-9
19-24
90-110
286-350
4-5
18-22
3.5
126-154
221-270
14-17
18-21
162-198
293-358
7-8
20-24
7.5
121-148
207-253
8-9
19-23
170-208
300-366
5-6
21-25
3.5
131-160
252-308
13-16
17-21
110-134
306-374
8-10
22-27
7.5
125-153
237-290
8-9
18-22
115-141
314-383
6-7
23-29
3.5
135-165
284-347
13-16
17-20
122-150
320-391
9-11
24-30
7.5
130-158
266-326
7-9
18-22
129-157
327-400
6-8
26-32
3.5
140-171
320-391
13-16
16-20
134-164
333-407
11-13
27-33
7.5
134-164
300-367
7-9
17-21
141-172
341-417
7-9
28-35
3.5
144-176
360-440
13-16
16-19
147-179
347-424
12-14
29-36
7.5
138-169
338-414
7-9
17-21
154-188
355-434
8-10
31-38
3.5
149-182
405-495
13-15
15-19
7.5
143-174
381-465
7-9
16-20
74-90
244-299
3-4
13-15
4.5
30˚
40˚
50˚
LV036
60˚
70˚
80˚
90˚
100˚
DISCHARGE WATER
PRESSURE
TEMP
AIR TEMP
PSIG
DROP, ˚F RISE, ˚F
78-95
251-306
2-3
13-16
4.5
9
122-149
183-224
14-18
19-23
87-106
257-314
4-5
15-18
9
117-143
172-210
8-10
20-24
91-111
263-322
3-3
16-19
4.5
131-160
214-261
14-18
18-22
164-201
269-329
5-6
17-20
9
126-154
201-245
8-10
19-24
173-211
276-337
3-4
18-22
4.5
136-166
244-298
14-17
18-22
111-136
282-344
6-7
19-23
9
131-160
230-281
8-10
19-23
117-143
289-353
4-5
20-24
4.5
141-172
275-336
14-17
17-21
124-152
294-360
7-8
21-25
9
135-165
258-316
8-10
18-22
131-160
302-369
5-6
22-27
4.5
145-178
310-378
14-17
17-20
136-166
307-375
8-9
23-28
9
140-171
291-356
8-10
18-22
143-175
314-384
5-6
24-30
4.5
150-183
349-426
14-17
16-20
149-182
319-390
8-10
25-30
9
144-176
328-401
8-9
17-21
156-191
327-400
6-7
26-32
4.5
155-189
392-480
13-16
16-19
9
149-182
369-451
8-9
17-21
This chart shows approximate temperatures and pressures for a unit in good repair. The values shown are meant as a guide only and
should not be used to estimate system charge. This chart assumes rated air flow and 80º d.b./67º w.b. entering air temperature in cooling,
70º d.b. entering air temperature in heating. Heating data at entering fluid temperatures below 50º assumes the use of antifreeze. As a
result of continuing research and development, specifications are subject to change without notice.
8 733 922 118 (2015/01)
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Operating Temperatures and Pressures | 29
OPERATING DATA
MODEL
ENTERING
WATER
WATER
FLOW GPM
TEMP, ˚F
30˚
LV042
COOLING
HEATING
WATER
SUCTION DISCHARGE
SUCTION
PRESSURE PRESSURE TEMP RISE, AIR TEMP PRESSURE
˚F
DROP, ˚F
PSIG
PSIG
PSIG
6
64-78
248-303
5-6
15-18
10
67-82
254-311
3-4
16-19
6
109-134
183-224
18-22
19-23
75-91
261-319
6-8
17-21
40˚
10
105-128
172-210
10-12
20-25
79-96
267-327
4-5
18-23
6
118-144
214-261
18-22
19-23
142-173
273-334
8-10
20-24
50˚
10
113-138
201-245
10-12
20-24
149-182
280-342
5-7
21-26
6
122-149
244-298
17-21
18-22
96-117
286-349
9-11
22-27
10
117-143
230-281
10-12
19-24
101-123
293-358
6-8
24-29
6
126-154
275-336
17-21
18-22
107-131
299-365
11-13
25-30
60˚
70˚
10
121-148
258-316
10-12
19-23
113-138
306-374
7-9
26-32
6
130-159
310-378
17-21
17-21
117-143
311-380
12-15
27-33
10
125-153
291-356
10-12
18-22
123-151
319-390
8-10
29-35
6
134-164
349-426
17-20
17-20
128-157
324-396
13-16
29-36
90˚
10
129-158
328-401
9-12
18-22
135-165
332-406
9-11
31-38
6
139-170
392-480
16-20
16-20
100˚
10
133-163
369-451
9-11
17-21
71-87
277-339
6-7
15-19
80˚
6
30˚
75-92
284-347
4-5
16-20
6
118-144
194-237
21-25
19-23
84-102
291-356
7-9
18-22
10
113-138
182-223
12-14
20-24
88-108
299-365
5-6
19-23
6
127-155
226-276
21-25
18-22
159-194
305-373
9-11
20-25
50˚
10
122-149
213-260
12-14
19-24
167-204
313-383
6-7
21-26
6
131-160
259-316
21-25
18-22
108-132
320-391
10-13
23-28
60˚
10
126-154
243-297
12-14
19-23
113-138
328-400
7-9
24-29
6
136-166
291-355
20-25
17-21
120-147
334-408
12-15
25-31
10
130-159
273-334
12-14
18-22
126-154
342-418
8-10
27-32
6
140-171
328-401
20-24
17-20
131-161
348-425
14-17
27-34
80˚
10
135-165
308-377
11-14
18-22
138-169
356-436
9-11
29-36
6
145-177
369-451
20-24
16-20
144-176
362-442
15-18
30-37
90˚
10
139-170
347-424
11-14
17-21
151-185
371-453
10-12
32-39
6
149-183
415-508
19-24
16-19
10
143-175
391-477
11-14
17-21
40˚
LV048
DISCHARGE WATER
PRESSURE
TEMP
AIR TEMP
PSIG
DROP, ˚F RISE, ˚F
70˚
100˚
10
This chart shows approximate temperatures and pressures for a unit in good repair. The values shown are meant as a guide only and
should not be used to estimate system charge. This chart assumes rated air flow and 80º d.b./67º w.b. entering air temperature in cooling,
70º d.b. entering air temperature in heating. Heating data at entering fluid temperatures below 50º assumes the use of antifreeze. As a
result of continuing research and development, specifications are subject to change without notice.
Revised 01-15
8 733 922 118 (2015/01)
30 | Operating Temperatures and Pressures
LV Condensing Section
OPERATING DATA
MODEL
ENTERING
WATER
WATER
FLOW GPM
TEMP, ˚F
30˚
LV060
COOLING
HEATING
WATER
SUCTION DISCHARGE
SUCTION
PRESSURE PRESSURE TEMP RISE, AIR TEMP PRESSURE
˚F
DROP, ˚F
PSIG
PSIG
PSIG
8
68-84
256-313
5-7
19-23
12
73-89
261-319
4-5
20-25
8
113-138
173-212
18-22
19-23
81-99
277-339
7-8
22-26
40˚
12
110-134
162-198
12-14
20-24
86-105
283-346
5-6
23-28
8
116-142
207-253
17-21
19-23
93-114
299-365
8-9
24-29
50˚
12
112-137
193-236
12-14
19-24
99-121
305-373
6-7
25-31
8
118-145
240-293
17-21
18-23
106-129
321-392
9-11
26-32
12
115-140
224-274
11-14
19-23
113-138
327-400
7-8
28-34
8
121-148
273-334
17-21
18-22
118-145
342-418
10-12
29-35
12
117-143
255-312
11-14
19-23
126-154
349-427
8-9
30-37
8
123-151
307-375
16-20
18-22
131-160
364-444
11-14
31-38
12
120-146
287-350
11-13
19-23
139-170
371-454
8-10
33-40
8
126-154
340-416
16-20
18-22
143-175
385-471
12-15
33-41
90˚
12
122-149
318-388
11-13
18-22
152-186
393-480
9-11
35-43
8
128-157
373-456
16-19
17-21
100˚
12
125-152
349-426
11-13
18-22
68-84
256-313
5-7
19-23
60˚
70˚
80˚
12
30˚
40˚
50˚
LV070
DISCHARGE WATER
PRESSURE
TEMP
AIR TEMP
PSIG
DROP, ˚F RISE, ˚F
60˚
70˚
80˚
90˚
100˚
16
73-89
261-319
4-5
20-25
12
117-143
182-222
15-19
21-26
81-99
277-339
7-8
22-26
16
114-139
170-208
11-14
22-27
86-105
283-346
5-6
23-28
12
120-147
215-263
15-18
20-25
93-114
299-365
8-9
24-29
16
117-143
201-246
11-14
21-26
99-121
305-373
6-7
25-31
12
123-150
248-304
14-17
20-24
106-129
321-392
9-11
26-32
16
119-146
232-284
11-13
21-25
113-138
327-400
7-8
28-34
12
126-154
282-344
14-17
19-24
118-145
342-418
10-12
29-35
16
122-149
263-322
10-13
20-25
126-154
349-427
8-9
30-37
12
129-157
315-385
13-16
19-23
131-160
364-444
11-14
31-38
16
125-153
294-360
10-12
19-24
139-170
371-454
8-10
33-40
12
132-161
348-426
13-16
18-22
143-175
385-471
12-15
33-41
16
128-156
326-398
10-12
19-23
152-186
393-480
9-11
35-43
12
134-164
382-466
12-15
17-21
16
131-160
357-436
9-11
18-22
This chart shows approximate temperatures and pressures for a unit in good repair. The values shown are meant as a guide only and
should not be used to estimate system charge. This chart assumes rated air flow and 80º d.b./67º w.b. entering air temperature in cooling,
70º d.b. entering air temperature in heating. Heating data at entering fluid temperatures below 50º assumes the use of antifreeze. As a
result of continuing research and development, specifications are subject to change without notice.
8 733 922 118 (2015/01)
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Compressor Characteristics | 31
COMPRESSOR CHARACTERISTICS
Compressor Data Plate
Model
LV018
LV024
LV030
LV036
LV042
LV048
LV060
LV070
Revised 01-15
Cold Winding Resistance Values (+/10%)
Three
Phase
Voltage
Code
Rated Voltage
Phase
RLA
LRA
R-C
S-C
Line-Line
Run
Capacitor
(μF/V)
1
2
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
3
4
5
1
3
4
5
1
3
4
5
208-230/1/60
265/1/60
208-230/1/60
265/1/60
208-230/3/60
460/3/60
208-230/1/60
265/1/60
208-230/3/60
460/3/60
208-230/1/60
265/1/60
208-230/3/60
460/3/60
208-230/1/60
265/1/60
208-230/3/60
460/3/60
208-230/1/60
208-230/3/60
460/3/60
575/3/60
208-230/1/60
208-230/3/60
460/3/60
575/3/60
208-230/1/60
208-230/3/60
460/3/60
575/3/60
1
1
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
3
3
3
1
3
3
3
1
3
3
3
6.5
5.8
7.4
6.7
5.9
2.9
9.9
8.5
6.9
3.6
13.0
11.3
7.8
3.9
13.6
12.0
8.8
4.4
15.7
11.0
5.4
4.4
26.3
15.6
7.8
5.8
28.3
19.2
8.7
6.9
43
46
43
46
63
30
54
46
63
30
74
67
68
34
88
67
68
34
84
88
44
36
134
110
52
38.9
178
136
67.1
55.3
1.431
1.4
1.431
1.4
0.982
1.4
0.819
0.802
0.656
0.802
0.54
0.453
0.97
-
2.383
2.4
2.383
2.4
1.729
2.46
1.634
1.76
1.558
1.76
1.6
0.792
0.365
-
1.362
5.329
1.362
5.329
1.152
4.606
1.152
4.606
0.928
3.593
5.678
0.68
3.2
5.33
0.6
2.52
3.74
30/370
30/440
35/370
30/440
35/370
30/440
40/370
35/440
45/370
35/370
45/370
80/370
80/370
-
Single Phase
8 733 922 118 (2015/01)
32 | Wiring Diagrams
LV Condensing Section
WIRING DIAGRAMS
Figure # 7
8 733 922 118 (2015/01)
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Wiring Diagrams | 33
Figure # 8
Revised 01-15
8 733 922 118 (2015/01)
8 733 922 118 (2015/01)
24.0
26.0
LV048-CS
LV060-CS
LV070-CS
21.5
33.3
32.5
32.5
26.0
21.5
C
21.00
21.00
21.00
19.00
19.00
19.00
HEIGHT
D
2.9
3.3
3.3
2.8
2.8
2.8
WATER
IN
E
13.4
13.2
13.2
10.8
9.8
8.5
WATER
OUT
All dimensions within ±0.125.
All dimensions in inches.
Specifications subject to change without notice
21.5
24.0
LV036, 042-CS
21.5
21.5
LV030-CS
B
DEPTH
A
WIDTH
LV018, 024-CS
Model
F
G
H
3/8"
3/8"
3/8"
3/8"
3/8"
3/8"
1"
1"
3/4"
3/4"
3/4"
3/4"
3.6
3.6
3.6
3.6
3.6
3.6
LIQUID
SUCTION ELECTRICAL
CONNECTION CONNECTION KNOCKOUT
10.7
10.7
10.7
10.7
10.7
10.7
J
1" F.P.T.
1" F.P.T.
1" F.P.T.
3/4" F.P.T.
3/4" F.P.T.
3/4" F.P.T.
WATER
CONNECTIONS
K
1.6
1.6
1.6
1.6
1.6
1.6
SERVICE
VALVE
GAS
8.4
5.2
5.2
7.0
5.7
5.7
L
3/8 OD
3/8 OD
3/8 OD
3/8 OD
3/8 OD
3/8 OD
1.9
1.9
1.9
1.9
1.9
1.9
SERVICE
M
VALVE GAS
CONNECTION SERVICE
VALVE
LIQUID
10.2
7.1
7.1
8.8
7.5
7.5
N
7/8 ID
7/8 ID
3/4 ID
3/4 ID
3/4 ID
3/4 ID
SERVICE
VALVE LIQUID
CONNECTION
34 | Dimensional Drawings
LV Condensing Section
DIMENSIONAL DRAWINGS
Subject to change without prior notice
LV Condensing Section
LV Condensing Section
Notes | 35
NOTES
Revised 01-15
8 733 922 118 (2015/01)
601 N.W. 65th Court, Ft. Lauderdale, FL 33309
Phone: 866-642-3198 | Fax: 954-776-5529
www.boschtaxcredit.com | www.FHP-MFG.com
Revised 01-15